CN104501666B - High-precision safe-type delay element - Google Patents
High-precision safe-type delay element Download PDFInfo
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- CN104501666B CN104501666B CN201410710172.8A CN201410710172A CN104501666B CN 104501666 B CN104501666 B CN 104501666B CN 201410710172 A CN201410710172 A CN 201410710172A CN 104501666 B CN104501666 B CN 104501666B
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- delay
- delay element
- extension
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Abstract
The invention relates to a high-precision safe-type delay element and belongs to parts for a delay detonator. The high-precision safe-type delay element is characterized in that (1) a delay explosive of which the chemical agent components comprise red lead, silicon powder, a burning rate modifier and a binder, wherein by precisely controlling the particle size and purity of the components, the chemical agent is subjected to aging treatment so that the storage performance and delay precision became stable; (2) structure of the delay element comprises a delay explosive as an inner layer, a hard metal restraint tube as a secondary layer and a metal wrap layer which has small thermal conductivity and low heat energy and is ductile as an outer layer; (3) preparation of the delay element is achieved by the following steps that the hard metal tube with desired specifications is selected, a metal hose sleeves the hard metal tube and is drawn and precisely cut into the restraint element with a desired length; and (4) explosive charging is performed, specifically the explosive is quantitatively press-charged into a delay explosive core with uniform density for many times under a constant pressure in a special device. Due to the precise control of the explosive charging and the effect of the outer wrapping layer, the delay element can be used for the assembly of industrial delay electric detonators or nonel tube detonators, and is especially suitable for the assembly of coal mine type millisecond delay electric detonators and thus the precision delay is completed.
Description
Technical field
The invention belongs to initiating equipment technical field, it is a part of medicament delay detonator and in particular to one kind is high-precision
Degree safety-type delay element.
Technical background
Adopting lead for retractable pencil drawing technique industrial detonator delay element more at present, delay powder is loaded in the lead pipe of casting, through many
Single or multicore lead delay element are made in secondary rolling and cover die drawing, determine the extension time according to cutting long and formula；Because lead matter is soft,
After medicine core density exceedes certain value, extruding lead wall deformation, make medicine core diameter and density unevenness；For multicore delay element, in drawing
During power effect different, make medicine core become irregular bar shaped；At print in card, medicine core attenuates, and delay element is integrally elongated；Separately
Outward, when medicine core density is less, or when defering medicine prescription changes, medicine dropping phenomenon occurs at delay element two ends；Such as above-mentioned
Technique all can affect delay powder combustion accuracy, and a large amount of use of lead is unfavorable for environmental protection simultaneously.
Electric detonator accuracy delay time is high, and its invention has promoted the development of short-delay blasting, but electric detonator
Produce and human users' technical requirements high, expensive it is impossible to popularize in blasting engineering, and underground coal mine strictly prohibits the use of
Electric detonator.
Chinese patent, patent No. cn2628986y, disclosed delay body for industrial detonator, its delay powder constraint material is lead
Or lead-antimony alloy, outer layer plastic sheath；Tubular type delay element loads in Can, and pressurization is made；This utility model is no
Print in card, eliminate and in card, print the impact to delay precision, but be unable to the degree of packing of effective control delay powder and solve powder charge
The problem of density CONSENSUS.
Chinese patent, patent No. cn201637356u, disclosed precise detonator, its delay element is by compressing extension
Powder column is retracted in cage walls and makes, and the free-running property of different formulations delay powder, make compressing and be retracted into cage walls difficulty, technology
Have high demands, in addition cladding tube material can participate in reacting in delay powder combustion process, produce a large amount of gases, certainly will change delay powder
The local pressure environment of burning, thus affect delay precision.
Chinese patent, patent No. cn102173971a, disclosed micro- lead delay detonating detonator preparation method, its delay element
It is by drawing technique, will be equipped with the lead of delay powder and aluminium-alloy pipe is drawn into the thin metal pipe of required diameter, then to metal
Pipe makes delay element after carrying out plastic-coated, is cut into delay element and is assembled into delay detonator, avoids delaying using lead in a large number in this invention
Constraint material pollutes environment；Metal outer tube layer plastic-coated reduce metal material using and delay powder combustion process in heat dissipate
Lose, the stable state combustion of favourable delay powder, but drawing process is unable to the degree of packing that accurate quantification controls delay powder, in drawing process
Metal tube first fills delay agent, there is potential safety hazard, and the selection of metal aluminum pipe limits this delay element in allowed for use in coal mines millisecond
Application on electric cap.
Content of the invention
Patent purpose of the present invention is: is difficult to accurately control for the Powder pressing density of existing delay element, medicine core shape, shadow
Ring delay precision, and the requirement with reference to allowed for use in coal mines millisecond delay electric detonator delay element security, a kind of high accuracy of invention is pacified
Holotype delay element.
Patent high accuracy safety-type delay element of the present invention includes: the structure of delay element, the preparation of extension confinement element,
The powder charge of delay powder.
Delay element described in patent high accuracy safety-type delay element of the present invention is made up of three parts, outer layer covers layer, its
Material is the metal that thermal conductivity factor is little, matter is soft, low calorie, ductility are good, such as lead, lead-antimony alloy.Integument external diameter be 6.2 ±
0.1mm, in the range of 1.6～2.2mm, sublevel restraint layer is low calorie hard metal pipe to wall thickness, and wall thickness is in 0.5～1.0mm model
In enclosing, such as copper pipe, stainless steel tube, kirsite pipe etc., metal tube ensure that tube wall is not during encapsulation process and pressing
Deformation, makes medicament shape and degree of packing consistent, and middle is medicine core medicament, according to the requirement of time of delaying select different series,
Different formulations delay agent, after press-fiting, medicine core is regular cylindrical, and its medicine core diameter is in the range of 1.0～2.0mm.
In the preparation process of extension confinement element described in patent high accuracy safety-type delay element of the present invention, according to difference
Series, different formulations delay powder, choose material and the caliber that sublevel hard metal constrains pipe, selection principle: low heat release delay powder
Constraint caliber can select major diameter constraint pipe, and the constraint caliber of highly exothermic delay powder medicine core can suitably reduce, in hard metal
Coated metal pipe is put, tight internal layer hard metal restraint layer after cold-drawn, using accurate cutting by hollow extension outside pipe
Body is cut into the extension confinement element of Len req.
The powder charge of the single delay element described in patent high accuracy safety-type delay element of the present invention is in special powder charge
Carry out in device, this device includes fixing kerve, back taper funnel, push rod, constant-pressure pressing machine, batcher, its powder charge process exists
In: extension confinement element bottom is placed in fixing kerve, top puts special back taper funnel, according to different series, difference
The required density of formula extension drug stabilisation burning, calculates single dose and drug-pressuring pressure, chooses batcher, arrange drug-pressuring pressure；
Thimble pressing is acted on using constant pressure arrangement, thimble diameter is consistent with hard metal internal diameter, carry out multiple, quantitation, level pressure powder charge, extremely
Powder column height is highly flushed with extension confinement element.
The beneficial effect of high accuracy safety-type delay element of the present invention is: sublevel hard metal restraint layer ensure that delay powder
After press-fiting into high density, powder column is indeformable, keeps regular columnar structure；Powder column is able to ensure that using multiple, quantitation, level pressure powder charge
Even density is consistent, improves medicament combustion stability, improves delay precision；Outer layer covers metal adopts that thermal conductivity factor is little, Yi Yan
Exhibition, low calorie, easy drawing forming, and tight sublevel hard metal, low heat value material is applied to underground coal mine, straight according to medicine core
The big I in footpath meets the requirement of underground coal mine different safety class.
Brief description
Fig. 1 is extension confinement element structure chart of the present invention.
Fig. 2 is delay element structure chart of the present invention.
Fig. 3 is powder charge figure of the present invention.
Wherein: 1 outer layer covers layer, 2 sublevel hard metal restraint layers, 3 delay grains, 4 firm bankings, 5 back taper funnels, 6
Pressing push rod, 7 extension confinement elements, 8 delay elements, 9 means for loadings.
Specific embodiment
Embodiment 1. degree of packing uniformity controlling.
Selection material is stainless steel metal pipe, and external diameter is 3mm, and wall thickness 0.5mm is as hard metal restraint layer, outer layer covers
Layer choosing draws materials matter for lead, and lead pipe is enclosed within stainless pipe, through being drawn into the extension obligatory point that external diameter is 6.3 ± 0.1mm, cuts
Be slit into 15mm length, extension confinement element, extension confinement element is placed in firm banking, puts the leakage of special back taper
Bucket, chooses the pressing push rod of a diameter of 2mm, and medicament is red lead-silicon-three sections of selenium system defering medicine prescription, and pressing pressure is 300mpa,
Drug pressing machine is calculated according to push rod section and sets pressure f value, weighing extension confinement element quality is m1, dosing, pressing are high to powder column
Degree is highly equal with extension confinement element, weighs quality m of delay element2, by formula ρ=(m2-m1)/(πd2/ 4) × h, wherein h
For powder column height, d is powder column diameter, thus calculating grain density, table 1 is 10 degree of packing statistics.
Table 1
Embodiment 2. delay element extension time test.
Delayed the time using the above-mentioned delay element of photoelectricity test technical testing, delay element is loaded the metal tube of both ends open
In, using the fixing sample of special seal device and photoelectric sensor, by oscilloscope display test waveform, read every extension from waveform
The extension time of element, statistical analysis, obtain data shown in table 2.
Table 2
Above-mentioned two case study on implementation result shows: the delay element press-fiting through multiple, quantitation, level pressure, and grain density is equal
Even property is good, and density relative deviation is 1.67%；Extension time test result shows, accuracy delay time is higher, and extreme difference is
3.210ms, relatively extreme difference are 1.568%.
Case study on implementation 3. delay element wall surface temperature is tested.
Selection material is stainless steel metal tubule, and external diameter is 2mm, and wall thickness 0.5mm is as hard metal restraint layer, outer layer covers
Layer choosing draws materials matter for lead, and lead pipe is enclosed within stainless pipe, through being drawn into the extension obligatory point that external diameter is 6.3 ± 0.1mm, cuts
Be slit into 15mm length, extension confinement element, extension confinement element is placed in firm banking, puts the leakage of special back taper
Bucket, chooses a diameter of 1mm pressing push rod, and medicament is red lead-silicon-three sections of selenium system defering medicine prescription, and pressing pressure is 300mpa, root
Calculate drug pressing machine according to push rod section and set pressure f value, dosing, pressing are highly equal with extension confinement element to powder column height.
Choose factory's 3 sections of permitted electric detonator for coal mine delay elements of finished product, using infrared radiation thermometer test delay element combustion
Wall surface temperature during burning.
Table 3
Test result indicate that, in the high accuracy safety-type delay element medicine core combustion process of invention, the heat of generation is through about
Bundle element heat transfer, to wall, makes wall surface temperature rising, temperature value and existing 3 sections of permitted electric detonator for coal mine delay element walls
Temperature difference is little.
Proved by above experiment case study: high accuracy safety-type delay element, medicine core even density is easy to control, delay precision
High；In combustion process, delay element wall surface temperature is low, extension confinement element material low calorie, and suitable underground coal mine uses.
Claims (5)
1. high accuracy safety-type delay element is it is characterised in that include: the structure of delay element, delay element is by outer layer covers
Metal level, sublevel hard metal restraint layer and internal layer extension medicine core composition；The preparation of delay element, the hard metal of specification needed for selection
Pipe, puts outer layer covers metal hose, tight internal layer hard metal restraint layer after drawing, using accurate cutting, by sky
Heart delay element is cut into the extension confinement element of Len req；Powder charge, does not require to select corresponding delay agent according to section, in powder charge dress
In putting, delay powder is press-fited using multiple, quantitation, level pressure, make medicine core be pressed into the column structure of even density.
2. high accuracy safety-type delay element as claimed in claim 1, the preparation method of its delay element is: by cold drawn
The metal tube of the mode unlike material pulling out processes, level pressure quantitative loading after then being cut.
3. high accuracy safety-type delay element as claimed in claim 1, its architectural feature is: outer layer covers layer material is to lead
The metal that hot coefficient is little, matter is soft, low calorie, ductility are good, integument external diameter is 6.2 ± 0.1mm, and wall thickness is in 1.6～2.2mm
In the range of；Sublevel restraint layer is hard metal pipe, and wall thickness, in the range of 0.5～1.0mm, can select not according to extension time requirement
Homologous series, different formulations delay agent are regular cylindrical as internal layer delay agent, medicine core, and medicine core diameter is in 1.0～2.0mm
In the range of.
4. high accuracy safety-type delay element as claimed in claim 1, its powder charge process is: by extension confinement element bottom
It is placed in fixing groove, top puts special back taper funnel, according to needed for different series, the burning of different formulations extension drug stabilisation
Density, calculates single dose and drug-pressuring pressure, carries out multiple, quantitation, level pressure powder charge, high to powder column height and extension confinement element
Degree flushes, and described pressing mode is to act on pressing push rod using constant pressure arrangement, and thimble diameter is consistent with hard metal internal diameter.
5. high accuracy safety-type delay element as claimed in claim 1, powder charge can be synchronized using multiple means for loadings,
Continuously, automited powder charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710172.8A CN104501666B (en) | 2014-11-27 | 2014-11-27 | High-precision safe-type delay element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710172.8A CN104501666B (en) | 2014-11-27 | 2014-11-27 | High-precision safe-type delay element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104501666A CN104501666A (en) | 2015-04-08 |
| CN104501666B true CN104501666B (en) | 2017-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410710172.8A Expired - Fee Related CN104501666B (en) | 2014-11-27 | 2014-11-27 | High-precision safe-type delay element |
Country Status (1)
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107238333B (en) * | 2017-05-26 | 2019-05-31 | 王勇兵 | Detonator extension element and preparation method based on cold extrusion plastic deformation plastic tube |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA955110A (en) * | 1971-12-01 | 1974-09-24 | Frederik Van Zeggeren | Delay elements for blasting caps |
| CN1023619C (en) * | 1988-10-15 | 1994-01-26 | 冶金工业部马鞍山矿山研究院 | Technology and mould producting delayed-action component |
| US5173569A (en) * | 1991-07-09 | 1992-12-22 | The Ensign-Bickford Company | Digital delay detonator |
| CN2628986Y (en) * | 2003-06-07 | 2004-07-28 | 湖南省湘南爆破器材有限责任公司 | Delay body for industrial detonator |
| CN202614099U (en) * | 2012-03-22 | 2012-12-19 | 江西新余国泰特种化工有限责任公司 | Novel environment-friendly delay element |
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2014
- 2014-11-27 CN CN201410710172.8A patent/CN104501666B/en not_active Expired - Fee Related
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Granted publication date: 20170118 Termination date: 20181127 |